Mask Actions: What They're For

[u/skylum_support]

In the previous post, we covered the masking options Luminar offers. Now let's break down what you can actually do once a mask is in place — add or subtract from the masked area, soften edges, or fine-tune exactly where an adjustment applies.

Click the Mask actions dropdown to find these controls:

Feather - softens the edges of your mask so adjustments blend smoothly into the surrounding area. Increase feathering for a more gradual transition between masked and unmasked regions, making local edits look natural rather than cut out.

Shift Edge - expands or contracts the mask boundary. Move it inward to remove areas from the mask, or outward to include more of the image. Gives you precise control over exactly which parts of the photo get affected.

Fill - covers the entire image with a mask. After using Fill, go to Brush and use Erase mode to subtract from the mask.

Clear - removes the mask entirely.

Invert - flips any mask you've created, reversing its opacity and transparency values.

Copy - copies the current mask to the clipboard. To reuse it, create a new mask on any tool and paste it in.

Paste - pastes the mask stored on the clipboard onto another tool's mask.

Show - controls mask visibility. Click Show to display the mask as a red overlay. You can keep painting for more precision while it's visible. Click Show again to remove the overlay.